No I did not even think about Repair. (It has always been a faulty version of Avast before.)
It fixed the problem for now. I wonder what happened. At the moment I have not seen any other (acute) problems on this pc. Could it be the Avast updater?
Hi Beogl,
Is it possible Windows 10 has updated recently? Sometimes after an update the network stack and sometimes some 3rd party services have problems until after a full reboot.